Abstract
Corrosion behavior of AZ31 magnesium alloy in NH 4 + -bearing chloride solution with controlled pH was investigated by weight loss experiment, hydrogen collection, and electrochemical test combined with surface morphology and topography observation. The results show that NH 4 + and pH of the solution can affect the corrosion of AZ31 magnesium alloy. The existence of NH 4 + affects the formation and dissolution of corrosion products, which makes the protective effect of the corrosion product layer weaker. The change of pH value not only affects the corrosion mechanism of AZ31, but also alters the concentration of NH 4 + ions in the solution, which further influences the corrosion product layer of AZ31, and finally makes the corrosion of AZ31 change significantly.
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